Problem

I hava two packages a@1.0.0 and b@1.0.0 that a is depend on b.

and my config.json looks like below

{
  "$schema": "https://unpkg.com/@changesets/config@2.0.1/schema.json",
  "commit": false,
  "fixed": [["a", "b"]],
  "access": "restricted",
  "baseBranch": "main",
  "updateInternalDependencies": "patch",
}

In this condition, If I made a change on package a and made changeset to bumb up minor version.
After that, I ran changeset version to bump up packages version.
I expected the pacakge's versions were bumped up as v1.1.0 each. But they were turned into v2.0.0.

What is problem?